I am reworking the looks of my engine to have a Ford Motorsports PCV breather filter and the standard PCV valve connected to the manifold vacuum. I like the looks of this breather so I want to place it on the driver's side bank valve cover at the front, which then I have to place the PCV valve on the passenger's side bank at the rear. I can't see any problems on reversing the PCV flow of the engine but I thought I will ask the experts in this site. I think it looks cleaner this way because the PCV vacuum will have a shorter run from the rear of the passenger side bank to the base of the EFI unit, which is facing towards the rear of the engine.